/Engine/Source/Editor/Sequencer/Public/SequencerChannelInterface.h
Add (or update) a key to the specified channel using it's current value at that time, or some external value specified by the extended editor data
A handle to the new or updated key
virtual FKeyHandle AddOrUpdateKey_Raw &40; FMovieSceneChannel &42; InChannel, UMovieSceneSection &42; SectionToKey, const void &42; ExtendedEditorData, FFrameNumber InTime, ISequencer & Sequencer, const FGuid & ObjectBindingID, FTrackInstancePropertyBindings &42; PropertyBindings &41; const